After performing the relevant checks and analyzing origins of differences, it is necessary to apply the appropriate corrections, according to this file. The corrections can be done via FI (this is the primary option that should be used almost every time) or via COPA, according to the type of difference.
Note:
A) For all corrections done in FI it's recommended to use document type S1, and it's mandatory to use one GL account which is mentioned in parameter G/L account for non-GBB:

B) For all corrections done in COPA it's mandatory to use one of the following value fields:
FERTP Vbl.manuf.costs
FERTF Fix prod. costs
VVF00 F00 DEP Std
VVD0X D0X VC Variance COGS
VVE0X E0X FC Var. COGS
VVF0X F0X DEP Var. COGS
VVICP ICP Interco cost
VV151 151 samples
VVTXA Adj Fiscal Deprec
AND to fill the following characteristics: Material + Plant + Profit Center + Amount.
Additionally, we need to check if which quantities should be posted in our correction:

A check by plant/material should be done after corrections have been applied to guarantee that everything is OK.
At the end of the analysis and correction process, the gap should be equal or near 0.