My new husband and I are both self-employed with home offices (from our respective houses) that we have previously deducted very straightforwardly on a square footage basis. My office is a defined portion of my house where I do design work and meet with clients. My husband builds furniture and requires a lot of space and a specific set-up. The past few months we have been building a workshop for him at "my" house, so that we will eventually be able to sell his house. We both live in my house, but he has been driving to his old house all year as his place of work. He is hoping to move into the new workshop in a few weeks. I am very confused as to how I should deduct the new workshop on our taxes for 2020. The bulk of the expense occurred in 2020, but he still used his former home as his active workshop while the new building was under construction. I should also note that the residential part of his house was rented last year. Please help!
