Reclassifying single member LLC to partnership LLC with amended W-9

I am planning to file Form 8832 to re-classify my LLC as a default single member to a partnership. I plan to make the the effective date 01/01/2023 in order to not have to file a separate short year return.

 

However, I have already provided in the past a W-9 to a company with "Individual/sole proprietor or single-member LLC" checked in box 3 and my personal SSN for Part 1. I plan to update the W-9 with the company with "Limited liability company" checked and "P=Partnership" and provide the TIN of the LLC (which I already have).

 

The problem is that the company has already made two payments to us and I expect that at the end of the year they will a 1099-MISC for the first two months and another 1099-MISC for after the change.

 

My question is:

1. Is it possible to re-classify the 1099 income for first two month to the partner LLC?

2. If not, do we have to file a short year return anyways for 2023? In that case, would it be better to make the effective date now rather than 01/01/2023?