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Would you kindly give more context to your question about "PDF converter what is it" like, what product you're using, so our community may be able to help you answer your question?
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For PTO, PDF converters serve little purpose because your clients' returns are generated natively by PTO as PDF files.
PDF editors, on the other hand, could be useful because PTO doesn't have any built-in function for customizing contents of the client letter (i.e. filing instructions).
Still an AllStar
It is one of the two functions that will make the charge take place for the return. You can input, calculate and review the return for NO CHARGE. Once you e-file or use the PDF Converter, PTO will charge for the return. The return can then be filed electronically (e-file) or paper (pdf).