Used my personal account for business expenses

[Darren Love]

Last summer I bought my first house hack, a 4 unit building. I know that everything is deductible, save your receipts, and keep track of your purchases.  But I have used my personal accountants to purchase items for the building, paid contractors through Zelle, and haven't been utilizing the business accountant until recently.  Can I still deduct those expenses from my taxes?