How soon is it okay to at least sit at a desk and type after BA?

Typing and moving your arms to type should not have any bearing on the outcome of your surgery.  In fact, the women in my practice who have had breast augmentations are allowed to have full range of motion of their arms in the recovery area.  They are able to begin work and working out within 48 hours and have also had aerobics instructors teaching in 72 hours.

Each Plastic Surgeon has his or her post op instructions.  Some can vary greatly.  The best plan for you is to speak to your surgeon and follow their instructions. All the best to you.

Every patient's case and recovery is unique as well as every plastic surgeon's post- operative protocol so always check with your surgeon first if you have any questions regarding your recovery.  For my own breast augmentation patients, sitting at a desk and typing one week after surgery is perfectly fine with me. Best wishes.