Under Settlement, you'll find three fields: your Bank account for Amazon deposits and the default income and expense accounts for non-order income and expenses that occur on the settlement.
Some of these non-order income and expenses include Amazon reimbursements for warehouse damaged inventory and FBA storage fees.
All miscellaneous settlement income from Amazon that isn't already mapped will go into the Default Other Income Account. This may include transactions from reimbursements.
Your Previous Reserve Amount is mapped to this Default Other Income Account by default, so you may want to map it to your own Bank account in the Custom Mapping field below.
All miscellaneous settlement expenses from Amazon that are not already mapped will go into the Default Other Fee Account. These expenses can include your subscription fees.
Your Current Reserve Amount is mapped to this Default Other Fee account by default, so you may want to map it to the same Bank account as the Previous Reserve Amount. By doing this, your Current Reserve Bank account will always reflect how much you'll get on the next settlement, and your reports will be more accurate.
If you didn't map the Inbound Transportation Fee or Storage Fee, you'll find these automatically mapped to your Default Expense Account.