Tektronix Inc, Beaverton, Oregon says that tax charges for the fourth quarter and its full fiscal year to May 28 last are likel to exceed its pre-tax profits, and that as a result, it expects to report a net loss both periods. Pre-tax profit for the year is expected to be in the range of $14m to $16m, but taxes are likely to come to $32m, leaving the company with a deficit of between $16m to $18m when it reports a week today. Reasons for the heavy tax charge are that the company has provided reserves with respect to a dispute with the Internal Revenue Service concerning intercompany pricing; some book expenses in the fiscal year cannot be used to offset current taxes; and it incurred taxes under the Alternative Minimum Tax provisions.