I have a record of transactions that "goes back to 2011", but is there a better way to say that? I'm considering "a record that extends back to 2011", but I find both phrases a bit too colloquial.
You may use date from or date back
date from: to have existed since a particular time in the past
These masterly cantatas date from different periods in Bach's life.
date back: to have existed for a particular length of time or since a particular time:
This tradition dates back to medieval times.
Please check Cambridge dictionary
I am in agreement with @Robusto that "goes back to" is fine for everyday usage.
However, if more formality is required, how about:
- "Commencing on"
This reverses the direction of time to a forward direction (as opposed to "going back to"), and gives a sense of ongoing continuity of records, although you will likely need to be more exact about the starting date of your transactions - "commencing 2011" is likely to arouse suspicion - a month, and ideally an exact date would be preferable.
However, arguably this does not convey the continuity of records - IMO, originating would be more applicable to a single, specific document.