answered 1 year ago
Yes, that does make sense. Your P60 should include other jobs, but if when you have left jobs within a tax year (I think that is what you mean?) you have either not received a P45, or not passed it to your new employer then it is quite possible that your tax will have been calculated incorrectly by your new employer initially. However in theory your local tax office are able to keep track of you according to your national insurance number, and so any discrepancy within a particular tax year should be sorted out in your tax code for the following year.
Having said that, it was reckoned at one point that one in six tax codes were wrong, so if you haven't been providing the correct paperwork to your employers it is quite possible you were one of the six.
It should be possible to reconstruct the position from all your P60s, and P45s (you'll only need these if the P60 doesn't reference a job you left during the year) well enough to judge whether your tax position is roughly correct or not.
Alternatively you could ask HMRC to provide you with tax statements for the last decade or so. I have never done so, so I don't know what information they can/will supply, but it might be an easier solution in the first instance.
Best of luck