Haven't downloaded all year, missing months

Sometimes the banks only offer the past 90-180 days. Tiller will download in the background daily (even if you aren’t using your sheet), but, if you auth token times out, you may lose transactions if you wait so long to restore connectivity that it exceeds the bank’s buffer.

If you bank offers CSV downloads through the missing window, you may be able to restore the transactions manually. There are a few CSV workflows kicking around in the community and in the Tiller Community Solutions Add-on that can help.