I started an LLC in 2024, sole proprietor tax treatment, and asked my single customer to delay 2024 payments until Jan '25. They agreed and asked me to send monthly invoices for their accruals. Everything has gone to plan and they paid in January.
I haven't received a 1099, which seems correct because I understand 1099s are supposed to report on a cash basis.
BUT in the past I've received 1099s that report on accrual basis. I'm concerned that this customer's big 4 accounting firm will file a 1099, at some point, showing this income on accrual basis (i.e. in 2024).
So I'm thinking of reporting the income on Sch C Line 1 and then adjusting (subtracting) it out on Line 6.
Is there any reason this could be a bad idea?