Assuming that Master is a table in you DB:
USE [TrackIT]
GO
INSERT INTO [dbo].[tblTransactions]
(tblTransactions.Buyer_Initial,
tblTransactions.HeatTicketNumber,
tblTransactions.PO_Number,
tblTransactions.Transaction_Date,
tblTransactions.EndUserFirstName,
tblTransactions.EndUserLastName,
tblTransactions.EmployeeStatus,
tblTransactions.CostCenter,
tblTransactions.TermDate,
tblTransactions.License_Available,
tblTransactions.TransferFrom,
tblTransactions.TransferTo,
tblTransactions.EndUserLocation,
tblTransactions.EquipType,
tblTransactions.Quantity,
tblTransactions.Software_Description,
tblTransactions.Notes,
tblTransactions.Unit_Price,
tblTransactions.AllocationDate,
tblTransactions.Last_Renewal_Date,
tblTransactions.NextRenewalDate,
tblTransactions.LastRenewalPO,
tblTransactions.Transaction_Number)
Select
Master.Buyer_Initial,
Master.HeatTicketNumber,
Master.PO_Number,
Master.Transaction_Date,
Master.EndUserFirstName,
Master.EndUserLastName,
Master.EmployeeStatus,
Master.CostCenter,
Master.TermDate,
Master.License_Available,
Master.TransferFrom,
Master.TransferTo,
Master.EndUserLocation,
Master.EquipType,
Master.Quantity,
Master.Software_Description,
Master.Notes,
Master.Unit_Price,
Master.AllocationDate,
Master.Last_Renewal_Date,
Master.NextRenewalDate,
Master.LastRenewalPO,
Master.Transaction_Number
from [Master]
GO