Yes, tax transcripts are the best thing that you can send, and you do not have to send the W2 and 1099. But there is one exception; in the instructions for the i-864A, it states the following: "Do not include copies of these Forms if you provide an IRS transcript of your returns rather than a photocopy unless you filed a joint Federal income tax return with your spouse." Meaning that if the (joint/co-)sponsor files jointly with his/her spouse, he/she must also send the W2 and 1099. Perhaps I could be interpreting the instructions wrong I think we're both correct actually lol.
Everything is completed for my husband's case as well; he had his interview scheduled for Sept.12th but we hit a speed bump with his medical/sputum exam.
Congratulations!
What questions did they ask, if you don't mind me asking?
Yes, you should finish the DS-260 first. And also, I don't think you can get the medical done until you get an interview scheduled. According to St.Luke's Medical Center website (http://www.slec.ph/us-visa-applicants.shtml), an interview letter from NVC or interview appointment confirmation from the embassy is needed.