Gst query,...........

Sir please reply in the following situation
1.what to do CGST Rs. 400000 and SGST Rs. 400000 paid as IGST Rs. 800000 and vice versa through ITC utilisation? Can apply for refund of such excess paid taxes? Can adjust in subsequent month? Is any time limit for such adjustment?
2. Instead of taking the ITC Rs. 200000 it is shown as itc reversal in gstr 3B Rs. 200000 ( that means excess itc reversed)? We can claim this itc again?
3.ITC reversal Rs. 150000 is shown as output tax in GST return instead of showing it as itc reversal coloumn and this tax is paid through itc utilisation? What to do? It can adjust in subsequent month? It can adjust in subsequent month?
4.excess output tax liability Rs. 120000 shown in GSTR 3B paid through itc utilisation Can we claim the refund of excess tax paid through itc utilisation? It can adjust in subsequent month?