Why is the return of low-quality goods from the buyer not reflected in the Book of Income and Expenses?

Question

1C

USN. Income - expenses. We work in 2 bases. More precisely, in 2016 they kept accounting of the simplified tax system in one database, and since 2017. switched to another.
Inventory items (light garlands) received and credited in 4Q. 2016 (in the old database). They were also written off immediately (since they were installed on the downloader). Payment of the entire amount for goods and materials passed only in the 1st quarter. 2017 (in the new database) and the next day goods and materials in the amount of 1 pc. (Article 2900r.) had to be returned to the seller, because. turned out to be of poor quality.
In 1s I went to Purchases and sales - purchases - returns to suppliers - formed TORG 12 for a refund without VAT (postings came out: D.76/02, K / t 10/01 = 0 rubles and D / t 76/02 and K / t 91/01 - 2900 rub.). But in the Book of doh. and expenses nothing affected!
The payment was included in the expense in full and there should have been a posting in the expense column - "the cost of the goods returned by the buyer should be recorded in line G (reduction)" (= -2,900), but nothing came of it.
What am I doing wrong?