Periods should go at the end of every sentence. A couple of specific nuances, places where I often see errors with periods: when you have a parenthetical citation like this one, at the end of the sentence, the period should go after the citation, not before.
I very often will see students put the period here but because the citation is still part of the sentence, the period should go after the citation.
And then also, in certain abbreviations you’ll want to include periods. So for example, “i.e.” and “e.g.” and the abbreviation “et al.” should have a period after “al.” The abbreviation “U.S.” according to APA should include periods.
[Source: Walden University. https://academicguides.waldenu.edu/c.php?g=465757&p=3438019 ]