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@EleK Digging deeper into partnerships would probably help.  The thing to keep in mind is that you are actually a partner in a business.  Partnerships don't pay any taxes at the central, "business", level.  They pass all the taxable information to you, and you file it and pay your share of the taxes.  That puts you into a whole new realm of taxation, because the rules for partnerships are completely different than the rules for individuals.

So in a normal year, when you don't actually sell anything, you'll still enter in your K-1, possibly pay taxes on things like interest, dividends, or cap gains that they report, and also potentially have losses that are suspended to future years.  You should have had this in 2020 when you bought the partnership.

Then when you sell, 3 new things happen:  you have to report Ordinary Income from the partnership; you report your Cap Gain/Loss on the sales; and you also get to report any losses the partnership generated as an offset to the other two.

With that said, there are a couple things here that don't make sense.  First, you say you don't have any other capital gains.  But if you're 1099-B shows Sales Proceeds of $11,458.28, and a Cost Basis of $13,821.87, then you have a Cap Loss of ($2,363.59).  So why are you showing $9,976?  You must have something else in your Cap Gains contributing an extra $12,339 in gains.

Second, your K-1 adjustments to basis are -$6617.  Those adjustments will come from your 2020 and 2021 K-1s.  Its a combination of distributions you've received (19A on the K-1) and all the other taxable events on the K-1 (like the $2521 loss on line 1).  Your 2021 K-1 shows about $3,944 of adjustments.  So there must be $2,673 worth of adjustments from 2020.  Was all that distributions?  Because otherwise, you should have carryovers from 2020 that TT takes care of if you entered the info into TT.  But I don't see them, given what you've shown coming over from Sched E