diff --git a/docs/docs/install-common-issues.md b/docs/docs/install-common-issues.md
index b91fda2..2247983 100644
--- a/docs/docs/install-common-issues.md
+++ b/docs/docs/install-common-issues.md
@@ -1,3 +1,53 @@
-# Test page
+# Common issues
+
+## Errors when starting QBI
+
+### Error code (HRESULT:0x80040418)
+
+Usually this means that you need to be logged into your QuickBooks data file as the admin.
+
+The first time QBI loads, QBI needs to be granted permission to access the QuickBooks company data file.
+
+Run QuickBooks again, this time logging in as admin. Then run QBI.
+
+### Could not load file or assembly `Interop.QBFCxx`
+
+This usually means that you have not installed (or uninstalled) the QBFC that is a [required installation step](install-qbi.md#qbfc15-integration-package-installed)
+
+Redo your steps making sure you have installed the QBFC as indicated.
+
+### Could not start QuickBooks. Error code:(HRESULT:0x80040408)
+
+QuickBooks needs to be running with the company file opened before starting QBI.
+
+### QuickBooks does not appear to be running error
+
+![qb not running error](img/startqbi-qb-not-running-message.png)
+
+QuickBooks needs to be running with the company file opened before starting QBI.
+
+## Other issues
+
+### The invoice amounts differ from AyaNova
+
+The Rate set in QuickBooks for a Outside Service charge, or a Misc Expense charge or a Travel charge, or a Service charge is not what shows in the QuickBooks item Rate field - but instead is from what shows is the AyaNova retail charge for that item.
+
+This is correct and is the way QBI tells QuickBooks what to charge for these items.
+
+Please refer to the sections under [Invoicing](invoicing-howto.md) regarding these items.
+
+### Recently edited items don't show that way in QBI
+
+You've edited service workorders, or edited AyaNova or QuickBooks objects, but QBI does not display these changes.
+
+QBI caches QuickBooks and AyaNova information when QBI first loads - so if you enter new information into either QuickBooks or AyaNova with QBI running - QBI will not be aware of it until you refresh cached data from the main menu:
+
+![main refresh](img/main-menu-tools-refresh-cached-data-item.png)
+
+or restart QBI.
+
+### 'xxList:ID not found' errors
+
+This is usually becuase changes were made in QuickBooks or AyaNova after QBI loaded and so QBI's cached data is outdated.
+Select [refresh menu item](#recently-edited-items-dont-show-that-way-in-qbi) or restart QBI to re-cache the missing data.
 
-## TEST PAGE
diff --git a/docs/docs/install-preferences.md b/docs/docs/install-preferences.md
index 87a727f..857533d 100644
--- a/docs/docs/install-preferences.md
+++ b/docs/docs/install-preferences.md
@@ -84,16 +84,14 @@ If your QuickBooks does not support it you will see an information dialog here i
 
 Select the QuickBooks Invoice payment terms that should be used when invoicing Work orders.
 
-
 #### To be printed
 
 ![to be printed wizard page](img/setup-invoice-to-be-printed.png)
 
 Checkmark if you want QuickBooks to automatically flag QBI created Invoices as "To Be Printed".
 
-todo: from here
-
-
-
+#### Invoice memo field
 
+![invoice memo field wizard page](img/setup-invoice-set-memo-field.png)
 
+Checkmark if you want QBI to set some reference information in the Invoice's Memo field.
diff --git a/docs/docs/linksync-link.md b/docs/docs/linksync-link.md
index b91fda2..7729bde 100644
--- a/docs/docs/linksync-link.md
+++ b/docs/docs/linksync-link.md
@@ -1,3 +1,30 @@
-# Test page
+# Linking objects
 
-## TEST PAGE
+QBI maintains a set of links, a "map" between AyaNova and QuickBooks objects in order to synchronize them and invoice work orders.
+
+Linking is the process of telling QBI which _existing_ AyaNova object is linked to which _existing_ QuickBooks object.
+
+If an object doesn't exist on one side or the other then you must manually create them or using QBI export them to the other side via the [Export from AyaNova](linksync-export-from-ayanova.md) or [Export from QuickBooks](linksync-export-from-qb.md) features.
+
+## Manual linking
+
+Manual linking here means selecting individual items by hand from one side to link to an item on the other side.
+
+### When to use manual linking
+
+This is appropriate to use when:
+
+-   Existing Customers in AyaNova are actually billed to a head office that is entered in QuickBooks
+
+    So you would want multiple AyaNova Customers mapped (linked) linked to one QuickBooks customer (which is the one office that all these AyaNova Customers get their invoices sent to).
+
+-   You have manually entered some data in AyaNova that may not have the exact same name as the name in QuickBooks so the [automatic link](#automatic-linking) Auto-Link feature would not work
+
+-   You want full control over what existing AyaNova data is linked to what existing data in QuickBooks
+
+### How to manually link
+
+
+
+
+## Automatic linking