calculate running balance of debit credit using union all
Try this (you may need to adjust data types or play with clustered index on temporary table, may be use identity column):
CREATE TABLE #x(
VoucherNo int, 
DocumentDate datetime, 
Description varchar(255), 
Debit numeric(18,2), 
Credit numeric(18,2),
Balance numeric(18,2)
);
CREATE UNIQUE CLUSTERED INDEX cx_x ON #x(DocumentDate, VoucherNo);

INSERT INTO #x (VoucherNo, DocumentDate, Description, Debit, Credit)
SELECT '1'AS VoucherNo,''AS DocumentDate,'Opening' AS Description,isnull(SUM(JournalDetials.Debit),0)AS Debit,
    isnull(SUM(JournalDetials.Credit),0)AS Credit
    FROM JournalDetials INNER JOIN JournalMains ON JournalDetials.JournalMainId = JournalMains.Id
    INNER JOIN GLMainAccount ON JournalDetials.GLMainAccountId=GLMainAccount.Id
    where(JournalDetials.AccountId='001653')AND(JournalDetials.Date&lt;'03/31/2019')

    union all

    select(JournalMains.VoucherNumberPrefix+JournalMains.VoucherNumber)AS VoucherNo,JournalDetials.Date as DocumentDate,
    isnull(JournalDetials.Description,''),isnull(JournalDetials.Debit,0),isnull(JournalDetials.Credit,0)
    from JournalDetials inner join JournalMains on JournalDetials.JournalMainId = JournalMains.Id
    INNER JOIN GLMainAccount ON JournalDetials.GLMainAccountId = GLMainAccount.Id
where(JournalDetials.AccountId='001653' and JournalDetials.Date BETWEEN '03/31/2019' AND '04/09/2020')

DECLARE @Balance numeric(18,2), @DocumentDate datetime, @amt numeric(18,2), @VoucherNo int;
SET @Balance = 0;

DECLARE c CURSOR LOCAL STATIC READ_ONLY FORWARD_ONLY
  FOR SELECT DocumentDate, VoucherNo, Debit - Credit FROM #x ORDER BY DocumentDate, VoucherNo;

OPEN c;

FETCH c INTO @DocumentDate, @VoucherNo, @amt;

WHILE @@FETCH_STATUS = 0
BEGIN
  SET @Balance = @Balance + @amt;
  UPDATE #x SET Balance = @Balance WHERE DocumentDate = @DocumentDate AND VoucherNo = @VoucherNo;
  FETCH c INTO @DocumentDate, @VoucherNo, @amt;
END

CLOSE c; DEALLOCATE c;

SELECT VoucherNo, DocumentDate, Description, Debit, Credit, Balance, '' AS JournalTransationStatus
  FROM #x 
  ORDER BY DocumentDate, VoucherNo;

DROP TABLE #x;