Which LO version edits PDF files best?

I need to be able to fill-in and edit my Credit Karma 2019 Federal Income Tax Form 1040-SR.
I have Windows 10 on my HP computer. Please tell me which LibreOffice version works best on PDF files?
(Then I will download it).
Thank you.

None. Each following version includes improvements handling PDFs, but LibreOffice is not a PDF editor.

LibreOffice is not a PDF editor. It can produce PDF files but does not edit them afterwards.

In a very limited way, the Draw component can somehow edit PDF files. Draw is a vector drawing program. It can load PDF files page per page and will present the elements as a collection of base graphical shapes for repositioning, dimensioning, attributes change (colour, font, …). Note that text is broken up in many at most single line blocks (meaning a paragraph is made of many independent text homogeneous blocks).

As you see, this is not the kind of service you expect. To fill-in an “editable” PDF form, use your favourite PDF viewer.

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