Business & farm
The beginning capital balance should equal the ending balance from the previous year, that should come over automatically if you used TurboTax in the previous year. Line 21 of schedule L, the partner's capital balance on the balance sheet should equal the same amount, as they both come from the Schedule K-1 Worksheet entry. If you click on the line 21 box, a magnifying glass icon will appear to the left of the box and when you click on it, it will take you to the source entry for that line, the schedule K-1 worksheet.
You enter the opening capital account balance on the schedule K-1 worksheet, towards the bottom of that page where it says total beginning of year:
