GSTR: Restore some strings

gnucash/report/standard-reports/income-gst-statement.scm

@@ -37,10 +37,20 @@
 ;; Define the strings here to avoid typos and make changes easier.
 (define reportname (N_ "Income & GST Statement"))
 (define pagename-sorting (N_ "Sorting"))
-(define TAX-SETUP-DESC (N_ "From the Report Options, you will need to select the accounts which will \
+(define TAX-SETUP-DESC
+  (string-append
+   (_ "This report is useful to calculate periodic business tax payable/receivable from
+ authorities. From <i>Edit report options</i> above, choose your Business Income and Business Expense accounts.
+ Each transaction may contain, in addition to the accounts payable/receivable or bank accounts,
+ a split to a tax account, e.g. Income:Sales -$1000, Liability:GST on Sales -$100, Asset:Bank $1100.")
+   "<br><br>"
+   (_ "These tax accounts can either be populated using the standard register, or from Business Invoices and Bills
+ which will require Business > Sales Tax Tables to be set up correctly. Please see the documentation.")
+   "<br><br>"
+   (_ "From the Report Options, you will need to select the accounts which will \
 hold the GST/VAT taxes collected or paid. These accounts must contain splits which document the \
 monies which are wholly sent or claimed from tax authorities during periodic GST/VAT returns. These \
-accounts must be of type ASSET for taxes paid on expenses, and type LIABILITY for taxes collected on sales."))
+accounts must be of type ASSET for taxes paid on expenses, and type LIABILITY for taxes collected on sales.")))
 
 (define (income-gst-statement-renderer rpt)
   (trep-renderer rpt