@Salessio0564 

It depends on a number of factors.  What type of business entity is this - sole proprietorship, S-Corp or ???.  Is the business on accrual or cash basis?  Were 2024 tax returns filed based on the payments being received in 2025? 

Regardless of entity type, if you're on cash basis and 2024 tax returns were filed based on payments being received in 2025, then you should not change the payment dates back to 2024.  If you do, you will be shifting income that should have been reported in 2024 back to 2024, thereby not reporting the income at all.  You should report that income in 2025 at a minimum.  If the amount is significant, consider changing the payment dates back to 2024 and amending your 2024 returns.

If you're on accrual basis, the income was properly reported in 2024.  If you're a sole proprietorship, I would feel comfortable changing the payments back to 2024.  If you're an S-Corp, consider that your cash was understated and your A/R was overstated on your 2024 returns, so changing the payment dates back to 2024 will cause a mismatch between your books and tax return.