I would like to switch to a professional account and wanted to know if it is possible for this activity to open a VAT number under the flat-rate regime. Thanks

For the buying and selling of used items, there is the VAT margin scheme .... https://www.fondazionenazionalecommercialisti.it/node/981The scheme is analytical and difficult to integrate (not impossible) with the flat-rate scheme that you could use for the sale of new items. himario