Unlike 734(b), under 743(b) we don't adjust inside basis of the partnership assets
Well, you do adjust the inside basis of the assets, but only for the benefit of the purchasing partner.
and the adjustment shouldn't be reflected in the partner's tax capital account?
Correct.
in Box 13W: Section 754 Depreciation/Amortization for the affected partner
No, see below.
In my basis schedules (excel file, outside the return) I would track the 743(b) adjustment and the annual 754 depreciation?
Yes, of course. In addition, in your Excel file, you’ll want to reconcile K1 capital account to true outside basis.
Also, box 11F (Sec 743(b) positive adjustments) and box 13V (Sec 743(b) negative adjustments) would not come into play here as these boxes relate to positive and negative income adjustments?
No, use the 13V, not 13W. This adjustment impacts K1 income (or loss).
You also need to present the unrecovered 743(b) adjustment as of year-end. Box 20, Code AH.
There are also some QBI nuances. On the UBIA side, you need to think this through: Entire building will likely be UBIA…but, it’s been depreciated down. The 743 adjustment will peg off of the adjusted property basis, or we might say, the capital account of the selling partner, which has been diminished by depreciation expense. Thus, the full 743 adjustment will be duplicative to some degree. Example: Pretend 1 partner. Pretend unadjusted building basis is $1m, but adjusted basis is $800k. Selling partner’s capital account is $800k. Your guy buys him out for $1m, so we have a $200k 743 adjustment. Well, your guy will get a K1 with $1m of UBIA showing on it, just based on the partnership’s depreciation schedule. The “U” stands for “Unadjusted.” None of the $200k 743b adjustment represents UBIA because that would be duplicative. In other words, the building hasn’t gone up in value. The 743 adjustment is entirely related to prior depreciation expense in this example. That is, if you show $1.2m of UBIA, that’s not right. The building hasn’t gone up in value since the day it was acquired. Hence the concept of the “Excess” 743 adjustment for QBI/UBIA purposes. Now, if your guy bought selling partner out for $1.1m, that’s another story. Now we really do have new unadjusted basis.
Also not sure why you didn’t post any of the adjustment to Land.