Dear Ms. M__ C___:

You wrote:
>>I would love to know the proper spelling of the phrase “dos and don’ts.” Going by proper grammar, there should be no apostrophes (except for the contraction part of “don’t,” of course), but I see it constantly as do’s and don’t’s…what is your opinion?
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To be technically correct, the words do and don’t should be italicized or underlined since you are referring to the words themselves. The only time you use an apostrophe plus s to show a plural is with an italicized word. (Some authorities use them with acronyms).

So to be precise, write “do’s and don’t’s” with “do‘s” and “don’t‘s” italicized as well. See Grammar Slammer entries “Underlining or Italicizing Items which Name Themselves” and “Apostrophes with Italicized or Underlined Items” for more on this.

Online see https://englishplus.com/grammar/00000116.htm and https://englishplus.com/grammar/00000135.htm.