How to assign different default subaccounts to different GL accounts

Hello, 

Are you literally talking about AP and AR accounts? Or just using these as an example? If looking for a way to default AR and AP with given default Subaccount…

I recommend setting the default AP account and Subaccount on all vendor classes and all vendors to 12000 00010-100. You said 12000 is your AP control account in the chart of accounts. Also in Chart of Accounts, make sure Allow Manual Posting is not selected.

With this recommended configuration, only AP documents (transactions originating in Payables module) can post to account 12000 and every vendor is set up with the correct default Subaccount to go with 12000. 

The only time a posting error could occur is when a user clicks on the Financial tab of a Bill or Payment and manually changes the AP account or sub. It’s unlikely that users would change it, IMO. Though you were only asking about defaulting it, not preventing a change.
 

Proper training of users will help prevent errors. Optionally, access rights/roles can be used to make AP accounts display-only on documents. 
 

The same recommendation will work similarly in AR.

Laura

Yes, Jeff, you guessed correctly!

Sometimes I answer late at night from my phone… with no Acumatica in front of me. Sorry about any confusion caused by me using “approximate” column name from COA!

Subaccount can be defaulted from many, many places to help avoid user error.  Examples: default from Vendor GL Accounts Tab, Customers GL Accounts tab, Item GL Accounts tab, Inventory Posting classes, Entry Types, Payment Methods, Sales Order Types, etc.

GL Journal Transactions will not have any default, but most other screens do offer default accounts and subaccounts. If you need subaccount to default from only one place in all data entry screens without configuring the examples I mentioned, then do follow Reza’s advice to seek customizations.

Best,

Laura