I doctored all my billable hours…
Confession because I got a new job - I’ve never once had an accurate timesheet.
I looked at my tasks as buckets. I would fill up one bucket and when full, dump hours into the next. It did not matter what account I was working on or which client. If I used my expected hours for one account I would just fill the next. When I was over budget I would find something to blame it on (usually the client).
Not a single. Accurate. Timesheet.
Do not recommend and do not regret a thing.
Edit: Pro-tip if you have an account thats already obscenely overbudget, it's a great place to put hours in since you hopefully already have an excuse made.