When I moved addresses and went to do my tm30 for some reason they gave me a new 90 day report also (I think they didn't see the old one inside my passport and gave me a row but not a fine when they handed my passport back with the new one). I was just going to go tomorrow (my original date) incase I need to, but now I'm really busy and it would really be preferable not to. Is it safe to assume the new one overrides the old one and I can just go on that date. Yes, I should have asked at the time but I was confused about what they were telling me at the time, took me until I left and looked inside the passport to fully realise what they had done.
TLDR : Answer Summary
The user received a new 90-day report after updating their address with a TM30 form, leading to confusion about whether the new report overrides the existing one. Other users advised retaining both receipts but only reporting on the next due date given on the latest receipt. They emphasized the importance of clarifying any uncertainties during the reporting process.