Form 1041 estimated taxes paid -- "Bank Acct Num" allows only 4 digits

Please clarify where you are entering a bank account number in TurboTax Business.

Estimated tax payment by paper check. I'm supposed to enter the routing number but TTax allows only four digits to be entered.

More specifically: Tax Payments Worksheet / Part I / Information for Electronic Filing / Payment Method: Check / Bank Acct Num: only 4 digits permitted.

So do I simply enter the first four digits of the account number?

Or is it actually asking for the CHECK NUMBER?

Thanks!

To find additional help with any yellow field in a TurboTax form, right-click the box and choose "About..."
Here is part of that popup for the Tax Payments Worksheet:

• * Enter the last four digits of the bank account number if the method of payment selected is 'ACH Payment' or 'EFTPS.'
  * The EFTPS Confirmation Number is a 10-digit number, required if the method of payment selected is 'EFTPS.'

@slowreader 

Well, I've been using TTax for 1040 since DOS days, so about 1994 and for 1041 since 2000, and I always thought "help" was provided by clicking on Help on the black line at the top of the screen! (And I never did find it very helpful!)

Thank you!