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Find max number in a table and add 1

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I have a table with numbers used as a unique identifier.  I need to find the max number in that column and add 1 to it. I need it to not change when I filter the column. Is there a formula I can use?   If not what would a macro look like?   Thank you!

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A VBA macro isnt needed here- did my Answer below solve your problem ? 
John_Ru (rep: 3222) May 4, '22 at 5:57 am
Did you see my Answer below? Seems that the email alerts stopped working (following a site update) so you may have missed it.
John_Ru (rep: 3222) May 6, '22 at 12:32 pm
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Hi Josh(?) and welcome to the Forum.

The Excel worksheet function MAX isn't affected by filtering so you can use that.

If your identifiers are in column B say (and nothing above or below your table), this formula will work:

=MAX(B:B)+1

where the B:B bit in bold is the range for which the largest number is returned by MAX (and 1 added to it to give your "Next available identifier").

It's better to point to the column of the table containing your identifiers however. If you've put a formula like the above in a cell, you can edit the B:B bit  and select the part of the table containing the identifers- click in the column header and drag the cursor to the bottom then Enter. You'll then get a formula like this: 

=MAX(Table1[[#All],[Column2]])+1

where my second column in the table holds those numbers.

Hope this makers sense and solves your problem.

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