Splitting a row based on a column value - sql

Question

I have the following table output-
What I have:
Account No Description Seg1 Seg2 Seg3 Budget PeriodBalance
000-1120-00 Cash 000 1120 00 $1,000.00 $2,000.00
000-1130-00 Asset 000 1130 00 $1,500.00 $3,000.00
What I would like to have:
Account No Description Seg1 Seg2 Seg3 Budget PeriodBalance
000-1120-01 Cash 000 1120 01 $700.00 $1,300.00
000-1120-02 Cash 000 1120 02 $900.00 $1,700.00
000-1130-00 Asset 000 1130 00 $1,500.00 $3,000.00
Here, if the Seg2 is equal to 1120 then I would like to split it into 2 accounts suffixing the account No with 01 and 02 in place of 00 in segment 3. Once I have that, I would like to obtain the budget and the periodbalance for the new accounts. My original query is the following (Dynamics GP database Fabrikam):
Select
rtrim(c.Actnumbr_1) +'-'+ rtrim(c.Actnumbr_2)+ '-'+ rtrim(c.Actnumbr_3) as ACTNUMST,
c.ACTINDX,
c.ACTDESCR,
c.ACTNUMBR_1,
c.ACTNUMBR_2,
c.ACTNUMBR_3,
sum(a.PERDBLNC) as Period_Balance,
b.BUDGETAMT,
a.year1,
'' as docdate,
''as Vendname,'' as PONUMBER,
0 as PO_Amount,
0 as 'Not_Received_Amount',
0 as ENCMBAMT
from GL00100 c
left outer join GL11110 a on c.ACTINDX = a.ACTINDX
Left outer join
(Select
actindx,
sum(budgetamt) as budgetamt
from GL00201
where BUDGETID = 'budget2017'
and periodid <= 12 group by actindx) b
on c.ACTINDX = b.ACTINDX
where
a.PERIODID <= 12 and
a.year1 = '2017' and a.actindx < '18'
group by
c.ACTDESCR, c.ACTNUMBR_1, c.ACTNUMBR_2, c.ACTNUMBR_3, a.year1,c.ACTINDX,b.BUDGETAMT
Any help would be highly appreciated.