Home office deduction questions

I retired in June after many years with the same employer. From July-December I got a business license and worked as a consultant for the same company, on average 8-12 hour a week and received a 1099-NEC. One room of our rented apartment was my dedicated office. Can I claim a home office deduction for the % office portion of rent/utilities for July-December?

If so, would I have been required to send a 1099 to my landlord for the rent $  (given the rent is being deducted as a business expense)? or is this only for goods/services? Thanks in advance.