You can get the "other" or "new tax" button back by becoming a Professional Host (designed for those with multiple listings, but it worked for me with one; took a few days to propagate and show up on my Taxes tab). Then they will collect the new tax (for most of us, a Lodgers Tax), pass it on to us, and we'll submit to the appropriate city/county authority.
The TS-22 Agreement to Collect and Pay Over Taxes form may be defunct; the current CRS filers packet says marketplace sellers should fill out a "ACD-31101 Agreement to Collect and Pay Over Taxes to the Department"--either this is a replacement, or it's specifically designed for marketplace sellers like us. BUT, no sign of that form on the T&R website, and the phone number listed on the CRS filers packet has so far been unsuccessful for me (multiple messages left).
And yes, they're collecting an odd amount of taxes for "rest of county" in Santa Fe area. a bit over 8%; actually looks like a typo of the city rate to me (collecting 8.0439+/-; city rate is 8.439). But hey, no skin off our nose; it's costing our guests a bit more, but we can still file our CRS forms with our proper revenue/deductions (since they're being paid by AirBnB), and zero due from us.
BUT in lieu of figuring out the ACD-31101 or an NTTC (which some T&R folks say is an option), be sure to keep copies of AirBnB's accounting for each CRS period, to show what they paid for you! (and that their total revenue matches what you reported)
This Gross Receipts stuff is still new for AirBnB and NM; this is the first reporting date for most since AirBnB started collecting for us. I'm sure they'll figure it out eventually....