If you are looking for a review or guide on how to handle this today, here is the essential information:
The data previously collected in Appendix 3 (such as retail trade turnover and catering) is now integrated directly into Section 3 of the main Form P-1 . prilozhenie 3 k forme p 1 skachat
The document (Appendix 3 to Form P-1) was a Russian statistical report titled "Information on the Volume of Paid Services to the Population by Type" (Сведения об объеме платных услуг населению по видам). If you are looking for a review or